src/gallium/drivers/softpipe/sp_state_sampler.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 /* Authors:
  29  *  Brian Paul
  30  */
  31
  32 #include "util/u_memory.h"
  33
  34 #include "draw/draw_context.h"
  35
  36 #include "sp_context.h"
  37 #include "sp_context.h"
  38 #include "sp_state.h"
  39 #include "sp_texture.h"
  40 #include "sp_tile_cache.h"
  41 #include "sp_tex_sample.h"
  42 #include "draw/draw_context.h"
  43
  44
  45 struct sp_sampler {
  46    struct pipe_sampler_state base;
  47    struct sp_sampler_varient *varients;
  48    struct sp_sampler_varient *current;
  49 };
  50
  51 static struct sp_sampler *sp_sampler( struct pipe_sampler_state *sampler )
  52 {
  53    return (struct sp_sampler *)sampler;
  54 }
  55
  56
  57 void *
  58 softpipe_create_sampler_state(struct pipe_context *pipe,
  59                               const struct pipe_sampler_state *sampler)
  60 {
  61    struct sp_sampler *sp_sampler = CALLOC_STRUCT(sp_sampler);
  62
  63    sp_sampler->base = *sampler;
  64    sp_sampler->varients = NULL;
  65
  66    return (void *)sp_sampler;
  67 }
  68
  69
  70 void
  71 softpipe_bind_sampler_states(struct pipe_context *pipe,
  72                              unsigned num, void **sampler)
  73 {
  74    struct softpipe_context *softpipe = softpipe_context(pipe);
  75    unsigned i;
  76
  77    assert(num <= PIPE_MAX_SAMPLERS);
  78
  79    /* Check for no-op */
  80    if (num == softpipe->num_samplers &&
  81        !memcmp(softpipe->sampler, sampler, num * sizeof(void *)))
  82       return;
  83
  84    draw_flush(softpipe->draw);
  85
  86    for (i = 0; i < num; ++i)
  87       softpipe->sampler[i] = sampler[i];
  88    for (i = num; i < PIPE_MAX_SAMPLERS; ++i)
  89       softpipe->sampler[i] = NULL;
  90
  91    softpipe->num_samplers = num;
  92
  93    softpipe->dirty |= SP_NEW_SAMPLER;
  94 }
  95
  96
  97 void
  98 softpipe_set_sampler_textures(struct pipe_context *pipe,
  99                               unsigned num, struct pipe_texture **texture)
 100 {
 101    struct softpipe_context *softpipe = softpipe_context(pipe);
 102    uint i;
 103
 104    assert(num <= PIPE_MAX_SAMPLERS);
 105
 106    /* Check for no-op */
 107    if (num == softpipe->num_textures &&
 108        !memcmp(softpipe->texture, texture, num * sizeof(struct pipe_texture *)))
 109       return;
 110
 111    draw_flush(softpipe->draw);
 112
 113    for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
 114       struct pipe_texture *tex = i < num ? texture[i] : NULL;
 115
 116       pipe_texture_reference(&softpipe->texture[i], tex);
 117       sp_tile_cache_set_texture(softpipe->tex_cache[i], tex);
 118    }
 119
 120    softpipe->num_textures = num;
 121
 122    softpipe->dirty |= SP_NEW_TEXTURE;
 123 }
 124
 125
 126
 127 static struct sp_sampler_varient *
 128 get_sampler_varient( struct sp_sampler *sampler,
 129                      struct pipe_texture *texture,
 130                      unsigned processor )
 131 {
 132    struct softpipe_texture *sp_texture = softpipe_texture(texture);
 133    struct sp_sampler_varient *v = NULL;
 134    union sp_sampler_key key;
 135
 136    key.bits.target = sp_texture->base.target;
 137    key.bits.is_pot = sp_texture->pot;
 138    key.bits.processor = processor;
 139    key.bits.pad = 0;
 140
 141    if (sampler->current &&
 142        key.value == sampler->current->key.value) {
 143       v = sampler->current;
 144    }
 145
 146    if (v == NULL) {
 147       for (v = sampler->varients; v; v = v->next)
 148          if (v->key.value == key.value)
 149             break;
 150
 151       if (v == NULL) {
 152          v = sp_create_sampler_varient( &sampler->base, key );
 153          v->next = sampler->varients;
 154          sampler->varients = v;
 155       }
 156    }
 157
 158    sampler->current = v;
 159    return v;
 160 }
 161
 162
 163
 164
 165 void
 166 softpipe_reset_sampler_varients(struct softpipe_context *softpipe)
 167 {
 168    int i;
 169
 170    /* It's a bit hard to build these samplers ahead of time -- don't
 171     * really know which samplers are going to be used for vertex and
 172     * fragment programs.
 173     */
 174    for (i = 0; i <= softpipe->vs->max_sampler; i++) {
 175       if (softpipe->sampler[i]) {
 176          softpipe->tgsi.vert_samplers_list[i] =
 177             get_sampler_varient( sp_sampler(softpipe->sampler[i]),
 178                                  softpipe->texture[i],
 179                                  TGSI_PROCESSOR_VERTEX );
 180
 181          sp_sampler_varient_bind_texture( softpipe->tgsi.vert_samplers_list[i],
 182                                           softpipe->tex_cache[i],
 183                                           softpipe->texture[i] );
 184       }
 185    }
 186
 187    for (i = 0; i <= softpipe->fs->info.file_max[TGSI_FILE_SAMPLER]; i++) {
 188       if (softpipe->sampler[i]) {
 189          softpipe->tgsi.frag_samplers_list[i] =
 190             get_sampler_varient( sp_sampler(softpipe->sampler[i]),
 191                                  softpipe->texture[i],
 192                                  TGSI_PROCESSOR_FRAGMENT );
 193
 194          sp_sampler_varient_bind_texture( softpipe->tgsi.frag_samplers_list[i],
 195                                           softpipe->tex_cache[i],
 196                                           softpipe->texture[i] );
 197       }
 198    }
 199 }
 200
 201
 202
 203 void
 204 softpipe_delete_sampler_state(struct pipe_context *pipe,
 205                               void *sampler)
 206 {
 207    struct sp_sampler *sp_sampler = (struct sp_sampler *)sampler;
 208    struct sp_sampler_varient *v, *tmp;
 209
 210    for (v = sp_sampler->varients; v; v = tmp) {
 211       tmp = v->next;
 212       sp_sampler_varient_destroy(v);
 213    }
 214
 215    FREE( sampler );
 216 }
 217
 218
 219